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Effective heterogeneous electro-Fenton process of m-cresol with iron loaded actived carbon

机译:铁负载活性炭对间甲酚的有效异质电-芬顿过程

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The degradation of m-cresol (MC) has been investigated by a heterogeneous electro-Fenton process using iron loaded activated carbon (Fe-AC) as the heterogeneous electro-Fenton catalyst. Experimental results demonstrated that MC was effectively removed through an electro-Fenton process. Calculated TOC removal and overall energy consumption showed that the use of a low iron concentration (28 mg L-1) increases the efficiency of the process. The reactions followed a pseudo-first order kinetic equation and kinetic coefficients confirm that the MC reduction, when it is alone, is faster than in the presence of a similar compound, tert-butylhydroquinone (TBHQ) (from 0.0935 to 0.0692 min(-1)); therefore TBHQ exerts an antioxidative protection effect. In all cases, it is concluded that heterogeneous electro-Fenton treatment with Fe-AC follows a two-step process: adsorption and oxidation; allowing removal rates higher than in the literature. In addition, the reusability of this catalyst was demonstrated by operating it in continuous mode. Finally, LC-MS analysis allowed the development of a plausible degradation route.
机译:间苯甲酚(MC)的降解已通过非均相电Fenton工艺进行了研究,该方法使用铁负载活性炭(Fe-AC)作为非均质电Fenton催化剂。实验结果表明,MC是通过电子芬顿工艺有效去除的。计算出的总有机碳去除量和总能耗表明,使用低铁浓度(28 mg L-1)可以提高工艺效率。反应遵循拟一阶动力学方程式,动力学系数证实,单独存在时,MC还原比在类似化合物叔丁基对苯二酚(TBHQ)的存在下更快(从0.0935到0.0692 min(-1 ));因此,TBHQ具有抗氧化保护作用。在所有情况下,得出的结论是,用Fe-AC进行异质电芬顿处理遵循两步过程:吸附和氧化;吸附和氧化。允许去除率比文献中更高。另外,通过以连续模式操作证明了该催化剂的可重复使用性。最后,LC-MS分析允许开发合理的降解途径。

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